/Engine/Source/Editor/UnrealEd/Public/Kismet2/KismetReinstanceUtilities.h
Helper to gather mappings from the old class's fields to the new class's version
void GenerateFieldMappings ( [TMap](API\Runtime\Core\Containers\TMap)< [FFieldVariant](API\Runtime\CoreUObject\UObject\FFieldVariant), [FFieldVariant](API\Runtime\CoreUObject\UObject\FFieldVariant) > & FieldMapping )